Under O.C.G.A. § 33-9-21, when an organization such as ISO publishes reference loss costs for Georgia, what must an insurer do before using those loss costs?

Why this is the answer

Organizations such as ISO and AAIS publish reference loss costs: the expected-loss portion of a rate, with no allowance for an insurer's own expenses or profit. A loss cost is not a complete rate, so an insurer that wants to use one must add its own expense and profit loading through a loss cost multiplier and file the resulting rates with the Commissioner. O.C.G.A. § 33-9-21 requires every insurer to keep its rates on file with the Commissioner and, for lines other than personal auto, to file them at least 45 days before they take effect. The system lets each insurer compete on expense efficiency.